{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-43215","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-05-01T14:12:55.993Z","datePublished":"2026-05-06T11:28:17.425Z","dateUpdated":"2026-05-11T22:20:13.815Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T22:20:13.815Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ncifs: Fix locking usage for tcon fields\n\nWe used to use the cifs_tcp_ses_lock to protect a lot of objects\nthat are not just the server, ses or tcon lists. We later introduced\nsrv_lock, ses_lock and tc_lock to protect fields within the\ncorresponding structs. This was done to provide a more granular\nprotection and avoid unnecessary serialization.\n\nThere were still a couple of uses of cifs_tcp_ses_lock to provide\ntcon fields. In this patch, I've replaced them with tc_lock."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","baseScore":8.8,"baseSeverity":"HIGH"}}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/smb/client/cached_dir.c","fs/smb/client/smb2misc.c","fs/smb/client/smb2ops.c","fs/smb/client/smb2pdu.c","fs/smb/client/trace.h"],"versions":[{"version":"d7d7a66aacd6fd8ca57baf08a7bac5421282f6f8","lessThan":"953953abb66e52c224057ab91e404284fefeab62","status":"affected","versionType":"git"},{"version":"d7d7a66aacd6fd8ca57baf08a7bac5421282f6f8","lessThan":"601dd3b79769b38d30b693c40afdb2a4b7edf9d0","status":"affected","versionType":"git"},{"version":"d7d7a66aacd6fd8ca57baf08a7bac5421282f6f8","lessThan":"3969db6b22e3d90d8c5f22ac1a7fe0350a94c136","status":"affected","versionType":"git"},{"version":"d7d7a66aacd6fd8ca57baf08a7bac5421282f6f8","lessThan":"8c59eeeeffa1524ef57e173a89a1a3ff539888d5","status":"affected","versionType":"git"},{"version":"d7d7a66aacd6fd8ca57baf08a7bac5421282f6f8","lessThan":"96c4af418586ee9a6aab61738644366426e05316","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/smb/client/cached_dir.c","fs/smb/client/smb2misc.c","fs/smb/client/smb2ops.c","fs/smb/client/smb2pdu.c","fs/smb/client/trace.h"],"versions":[{"version":"6.0","status":"affected"},{"version":"0","lessThan":"6.0","status":"unaffected","versionType":"semver"},{"version":"6.6.128","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.75","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.16","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"6.19.6","lessThanOrEqual":"6.19.*","status":"unaffected","versionType":"semver"},{"version":"7.0","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.6.128"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.12.75"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.18.16"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.19.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"7.0"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/953953abb66e52c224057ab91e404284fefeab62"},{"url":"https://git.kernel.org/stable/c/601dd3b79769b38d30b693c40afdb2a4b7edf9d0"},{"url":"https://git.kernel.org/stable/c/3969db6b22e3d90d8c5f22ac1a7fe0350a94c136"},{"url":"https://git.kernel.org/stable/c/8c59eeeeffa1524ef57e173a89a1a3ff539888d5"},{"url":"https://git.kernel.org/stable/c/96c4af418586ee9a6aab61738644366426e05316"}],"title":"cifs: Fix locking usage for tcon fields","x_generator":{"engine":"bippy-1.2.0"}}}}